Machine for making castings



June 4, 1929. MQREHEAD 1,715,421

MACHINE FOR MAKING CASTINGS Original Filed Nov. 28, 1925 s Shets-Sheet 1INVEN+DVI June 4, 1929; F. H. MOREHEAD 5,

' MACHINE FOR MAKING CASTINGS Original Filed Nov. 28, 1925 ssheets-sheet 2 ,n MM MJ W June 1929- F. H. MOREHEAD mcnmr: FOR MAKINGCASTINGS s Sheets-Shet 5 Original Filed Nov. 28. 1925 INVEN+DVILPatented June 4, 1929.

UNITED STATES PATENT OFFICE.

FRENCH H. MOREHEAD, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TOFREDERICK C. LANQENBERG, 0F WATERTOWN, MASSACHUSETTS.

MACHINE FOR MAKING CASTINGS.

Application filed November 28, 1925, Serial No. 71,927. Renewed October12, 1928.

The present invention relates to machines for making castings inmetallic molds,-particularly small identical castings, large numbers ofwhich are required. The machine described in the present application isintended to practice a novel method of making castings shown anddescribed in an application ofFrederick C. Langenbcrg, filed November28, 1925, Serial No. 71,929. The principal steps of the method describedin this application are:

1. Placing the core in one of a pair of separable cooperating moldmembers while the said pair are separated from each other and while thecore-receiving member is in corereceiving position,

2. Closing the mold, while the core-receiving member is still incore-receiving'position,

3. Turning the mold into pouring position,

4. Pouring the metal,

5. Opening the mold while in pouring position and thereby permitting thecasting to drop out, and

6. Turning the mold to the original corereceiving position.

In the machine embodying my invention, the mold is made in two-or moresections which are movable toward and from each other by means of amechanism, preferably a fluid operated cylinder and piston which act ina plane perpendicular to the parting plane between the proximate facesof the mold members, and this entire mechanism is mounted on trunnionsso that the mold may be tilted from the core-receiving position which ispreferably horizontal to the pouring and ejecting position which ispreferably vertical.

The machine embodying my invention is of a simple, strong construction,and is capable of rapid operation.

The invention will be fully understood from the following descriptionwhen taken in connection with the accompanying drawings, and the novelfeatures thereof will be pointed outand clearly defined in the claims atthe close of this specification.

In the drawings:

- Fig. 1 is a side elevation, partly in section, of a machine embodyingthe invention showing the core in place and the mold sections about tobe closed.

Fig. 2 is a side elevation partly in section of the machine shown inFig. 1.

Fig. 3 is a plan view showing the mold sections closed and turned intopouring position.

Fig. 4 is a section on line 4-1 of Fig. 3, I

looking in the the direction of the arrows.

Figs. 5, 6, 7 and 8 are diagrams showing successive positions of themold sections during the cycle of operation.

Referring to the drawings, at A and B are shown a pair of mold sectionsadapted to receive the core C. The parting plane between them isindicated by the line 6-6 in Fig. 3., At D is shown the base of themachine, and at E and F two uprights, the upper ends of which are formedinto bearings to receive trunnions 11 and 12 of a swinging frame inwhich the mold sections-A and B are slidably mounted. The mechanism formoving the mold sections toward and from each other is also carried bythe. swinging frame. The swinging frame consists of a pair of side rods.13, 13, passing through holes in the trunnions 11 and 12 and rigidlysecured in place by set screws 15. (Seealso Fig. 4.) The ends of theside rods 13, 13,

are connected by cross members 16 and. 17. These parts form the swingingframe which is capable of movement about the axis of the trunnions 11and 12 through an arc of about 90 degrees. This movement is efiected bymechanism which will be hereinafter described. On the side rods 13, 13,are slidably mounted two mold supporting members 18 and 19,respectively. The lower mold supporting member 18, (see Fig. 1), isadjustable vertically by means of an adjusting screw 20 which passesthrough the lower cross bar 17. Except for this adjustment for differentsizes of mold sections, the lower mold supporting member 18 and the moldsection B secured thereto are not movable lengthwise of the tiltingframe. The upper mold supporting member 19 to which is secured the uppermold section A is reciprocable lengthwise of the side rods 13 by meansof a piston 22 secured to a piston rod 23, the lower end of which isfastened to the mold supporting member'19. The piston 22 works in acylinder 70 which is itself secured to a cross member 24 fastened to thetwo side rods 13, 13, by set screws 25. It will therefore be seen thatwhen air is admitted to the opposite ends of the said cylinder 70, thepiston 22, piston rod 23 and upper mold supporting member 19 will bereciprocated relatively to the lower mold section B. It will also beseen that in this way the mold may be closed and the and holds it undera back pressure determined by the opening of a relief valve 32. In

'this way, the action of the apparatus is cushioned against shocks whichwould otherwise occur during the rapid operation of the machine. The airfrom the main supply placed in the position shown in Figs. 1 and 2 withthe mold sections A and B separated from each other and the tiltingframe in vertical position. Thereupon the operator places the core C inthe lower mold section B; he then opens the valve 28 admitting air tothe upper end of the cylinder 7 0 and closing the molds. Since the valve27 is then in the exhaust position, the piston is free to move. Leavingthe valves 27 and 28 in this position, the operator opens the valve 57which admits air to the rear end, that is, the right-hand end of Fig. 2of the cylinder 50. At this time, valve 56 is connected with theexhaust. The piston 51 then moves to the left, as shown in Fig. 2,tilting the frame about the trunnions 11 and 12, and bringing the moldsections pipe 26, after passing through thethree-way from the positionshown in Fig. 5 to the posivalve 27, goes through the pipe 33 mto apasl'tionshown in Fig. 7. This is the pouring posagc 35 in the trunnion11. (See Fig. 4'.) The pipe 33 is stationary and extends into acounterbore in the trunnion, thereby permitting the trunnion to swing onits axis while the pipe 33 is stationary. The passage 35 in the trunnionis connected with a pipe 36 which extends along the side bar 13 of theswinging frame and enters the lower end of the cylinder 70. (See Fig.1.) Likewise, the three-way valve 28 is connected by the pipe 38 to theopposite trunnion 12. From the trunnion it passes through the pipe 39 tothe upper end of the cylinder 70. It will therefore be seen that whenthe valve 28 is in a position shown in Fig. 3, the upper end of thecylinder is vented to the atmosphere through the exhaust tank 31.Therefore, when the valve 27 is moved to the position shown in Fig. 3,air under pressure is admitted through the main pipe 33, the trunnion11, and pipe 36, to the underside of the piston 22.

The swinging of the swinging frame about the trunnions 11 and 12 iseffected by a cylinder 50 in which operates a piston '51 secured to theinner end of the piston rod 52. The cylinder 50 is secured to the frameof the machine and the piston rod 52 is connected to a crosshead 71which moves on suitable guides 53 secured to the frame. The crosshead 71is connectedto a link'54 which in turn is connected to the lower end ofan arm 55 fixed to the trunnion 12. It will therefore be seen thatmovement of the piston 51 will swing the swinging frame through an arcof substantially 90 degrees. The cylinder 50 is operated by compressedair received from the main supply pipe 26 and controlled by twothree-way valves 56 and 57. These valves are connected by pipes 58 and59 with the exhaust tank 31 already described. The valve 56 is connectedby the pipe 60 to the front end of the cylinder 50 and the valve 57 isconnected by the pipe 62 with the back end a of the said cylinder.

In operating the machine, the parts are sition. The metal is thenpoured. The operator then places the valve 28 in the exhaust positionand moves the valve 27 to admit air to the lower side of piston 22 incylinder 23,

In the drawings I have shown and in this specification described aseries of hand-operated valves for admitting compressed air successivelyto the two cylinders which 0 crate the machine, but I do not intend tolimlt myself to the use of hand valves or to a plurality of valves forthis purpose.

What I claim is- 1. In a machine for making castings, a pair of moldsections, a frame supporting said mold sections and permitting movementof one mold section toward and from the other, means for tilting saidframe and means carried by the said frame for producing said movement ofsaid mold section.

2. In a machine for making castings, a pair of mold sections, a swingingframe supporting said mold sections, means carried by said frame formoving the mold sections toward and from each other with a yieldingpressure.

3. In a machine for making castings, a pair of mold sections, a framesupporting said mold sections and permitting movement of one moldsection toward and from the other, means carried by said frame andacting at right angles to the parting plane of the mold sections formoving one of the mold sections towards the other, and means for tiltingthe said frame.

4. In a machine for making castings, a pair of mold sections, a frame suorting said mold sections, trunnions for saiiffi'aine, means carried bythe frame for moving the mold sections toward and from each other andlneans acting on the trunnions for tilting the rame.

5. In a machine for making castings, a pair 132 of mold sections, aframe supporting said mold sections, trunnions for said frame, a fluidpressure cylinder and piston carried by said frame and acting on one ofsaid mold sections to move it toward and from the other, there beingpassages through the trunnions and connecting the said cylinder with asource of fluid pressure supply and means for tilting said frame.

6. In a machine for making castings, a pair of mold sections, a framesupporting said mold sections, trunnions for said frame, afluid pressurecylinder and piston carried by said frame and acting on one of said moldsections to move it toward and from the other, there being passagesthrough the trunnions connecting the said cylinder with a source offluid pressure supply, and a second fluid pressure cylinder and pistonoperating on said trunnion to tilt the said frame. 1

In testimony whereof I aflix my signature.

' FRENCH H. MOREHEAD.

